Kinda related...^^^^^^ Implantable Cardiac Devices Could Be Vulnerable To Hackers.. https://science.slashdot.org/story/...-be-vulnerable-to-hackers-fda-warns?sdsrc=rel
And I don't feel comfortable with medical devices being used as evidence to incriminate people, I imagine a good defense lawyer could get this removed as evidence.
Yes, some are aware of the danger and disable wireless access. Like Dick Cheney: http://abcnews.go.com/US/vice-president-dick-cheney-feared-pacemaker-hacking/story?id=20621434